Chiller Installation Requirements

Chiller Installation Requirements.

1. Foundation & Mounting

⇒ Concrete Plinth/Base:

• Should be flat, leveled, and minimum 150 mm above FFL. 
• Designed to take dead load + dynamic load of the chiller.
• Ensure plinth length/width matches OEM mounting dimensions.

⇒ Vibration Isolators:

•  Use spring isolators or neoprene pads below the chiller to reduce vibration and structure-borne noise.
• For rooftop units, include seismic restraints if required by local codes.

2. Piping Arrangements

⇒ Chilled Water Lines

• Inlet & Outlet properly labeled.
•  Use flexible rubber bellows at inlet/outlet to absorb vibration and thermal expansion.
• Provide isolation valves, y-strainer, and flow switch.
• Install thermometers & pressure gauges at inlet and outlet for monitoring.
• Ensure correct pipe supports as per spacing schedule to avoid sagging.

⇒ Condenser Water Lines (for water-cooled only)

• Similar provisions as above.
•  Ensure proper sloping and venting.
• Include chemical dosing point, bleed line, and auto bypass if needed.

3. Insulation

⇒ All chilled water pipes must be insulated with closed-cell elastomeric foam (min. 19 mm–25 mm). 

⇒ Properly sealed joints and vapor barrier to avoid condensation. 

⇒ For outdoor pipes: UV-resistant cladding (aluminum or PVC) to protect insulation.

 4. Air Clearance & Accessibility

⇒ Maintain manufacturer’s recommended service clearance:

• Typically: 1.5–2.0 m on sides for maintenance.
•  Overhead clearance for removing compressor/heat exchanger tube bundles.

⇒ Ensure safe access ladders, platforms, or walkways if rooftop-mounted.

 ⇒ No obstructions around air-cooled condensers — at least 1.5 m air clearance on all sides.

 ⚡ 5. Electrical Power Supply

⇒ Provide dedicated MCC/Panel for the chiller.

 ⇒ Size power cable, isolator, and breaker as per full-load amps + starting current.

⇒ Include:

•  Remote start/stop
• Earthing/Grounding
• Cable tray support
• Overload and short circuit protection

⇒ Power supply must be stable voltage (±5%) and have phase sequence monitor.

 6. Control & BMS Wiring :

⇒ Terminate low-voltage wiring for:

• Remote start/stop
• Chilled water pump interlock
• Temperature and pressure sensors
• Alarm signals and status

⇒ Use shielded cables and proper segregation from power lines.

⇒ Integrate with BMS (BACnet/MODBUS/IP) for monitoring and load optimization. 

 7. Drainage & Slope

⇒ Provide floor drain nearby.

 ⇒ Chiller base shall have slope and a drain line connection.

⇒ For water-cooled units: condenser blow-down or drain provision is mandatory.

8. Bypass & Flow Provisions

⇒ Primary loop should have:

•  Motorized 2-way/3-way valve
• Auto balancing valve or differential pressure controller

⇒ Ensure minimum flow rate is maintained through evaporator (use flow switch).

 ⇒ Install manual bypass during initial flushing/testing phase.

 

 9. Commissioning Readiness

⇒ All sensors (Temp, Pressure, Flow) shall be calibrated. 

⇒ Water quality testing done (pH, TDS, hardness). 

⇒ System flushed, cleaned, and passivated. 

⇒ Air venting and pressure testing of piping done. 

⇒ Dry run of pumps and chiller before full load testing.

 10. Tagging, Labeling & As-Built

⇒ Chiller model, capacity, refrigerant, and serial number plates must be visible. 

⇒ All piping and cabling labeled as per project specs. 

⇒ Provide as-built drawings, O&M manuals, and test reports post-installation.